I go though them in a about 7 months but the good thing about them is when I buy a new pair I feel there is no brake in period they feel great on my feet. Also provides great lower back support while I?m exercising. Or in construction! I wear these everyday, no joke. Light jackets and maybe tshirts and that?s it. Estos H8i son como los H9i y los Sony, dan más potencia que el resto al 50% del volumen. I plan to replace the grips as well. The product looks good, and probably perfect for our needs. I bought the two bike rack to mount into my truck bed so i can lock the bikes down to go into a store or whatever. I went to return the product but was told the return window was closed and now I am stuck with a towel holder I am unable to use.